EnerLogic® 70 low-e commercial window film provides year-round insulation to existing windows. It gives an existing single-pane window the insulating performance of a dual-pane window, and provides an existing dual-pane window with the insulating performance of a triple-pane window.
Unlike many traditional low-e window films, EnerLogic 70 provides a visible light transmittance of up to 70%. It offers a clear view that doesn’t change the look of existing glass from the inside or the outside. It provides a uniform appearance without significantly darkening the windows or adding shine. – See more at: http://www.enerlogicfilm.com/commercial-use/70/benefits#sthash.hWr7aS2R.dpuf
EnerLogic 70 is a fraction of the cost to install compared to new commercial windows (and its installation is much less disruptive). Because of the energy savings this low-e commercial film provides, facilities professionals may expect to see a full return on their investment in five years or less – a 20% annual return on investment. It lowers initial costs and environmental impact without compromising energy efficiency or visibility.